Method of making pipe tongs



June 24, 1930. E. B, KIBBY v 1,765,838

- METHOD OF MAKING PIPE TONGS Filed June 25. 1925 2 Sheets-Sheet 1 ,122 1. I jab 1? INVENTGF? BY %%&7% 4 HTTGRNEYS June 24, 1930. E. B. KIBBY1,765,333

METHOD OF MAKING PIPE TONGS Filed June 25, 1928 2 ShetsPSheet 2 t V i IE2 10. 22 .11.

Enczc/c B.

WIT/V555 8) 3 3 17-0 ENE rs ,form the handle of the member and thenuniting thetwo members by pivoting the'nr together. As the shape of thejaws of the 7 "twomembers necessarily differs somewhat,

the Operations incident to the formation of their respective Qjawsnecessarily differ slightlytas will hereinafter-more fully apfpearalthough the same dies can be iltilized and preferably are so utilizedin the formation of the jaws of both members. .7

' In the accompanying drawings; I have preferably used in the practioe'of the inven- .tion. Figs. 3 and. '3 illustrate the position. of the.stock or work pieoe in the first i set e of tdies preparatoryto beingacted on by r them,gand jF-igs.4: and:;the shape of the illustrated inFigs. l to Q inclusiVe the dies I Work Piece af Y acted upon it;

, ig s' 6 and 6? illustrate the position of the work piece'in the secondset of dies preparatoryto being acted on by them; Fig.7 isa fragmentarycentral longitudinalsection of the heading toolused toform .thehead on,

the .main jaw,;*as' it may conveniently be termed,- substantiallysimultaneously with the second dieoperation; Figs. 8, QJand iillustratetheshape of the completed main J j am after the second die andheading operations, 'Fig..8'bei ngla fragmentarysideelevation of'the-jaw,jfFig; 9 a fragmentary flplanyiew, and Fig.;- 1 0- an end Viewthereof. .Figs '11; and 12- respectively are; Views correspondingto'Fi'gs. Sand. 9 illustrating the completed auxiliary or unheaded jaw;and

F'ggl3' is aperspect'ive View showing the V tvs o members ofthe tongsass'embl'edjtogether. 'lThe 1 same symbols are used. to designatesimilar parts in the several figures} v It will-be understood that the'dies or- "dii'iarily consist of rectangular blocks; of

metal adapted to .be seated in the housings or die holders of a suitablefor ing machine (not shown) as Wlll be,read1 lyjunderstood '7 thosefamiliar. with the; are;;: o.0nse,

- i of ithedieswwhich ajotually operate, upon-:the stock areillustrated. I 5 7 7 Referring now tothe first set of dies quentlyi inthe drawings onlyQthose portions shown in Figs'. 1, 1?and 1" Fig. l i'saffront endy-iew of the two diesA and TB separated to permit:introduction of the. stoclg'whi'le Fig.1? is a fa6 "16W TOf lh6dlenBand/Fig.

;l 1a.:face.'view-of the dieA; ,It will be ob-: served that'die VAV-is,provided with a quarterround channel l disposed withkits fiat surface1., uppermostf and =in. they-horizontal plane; this channel whichextends clear, to the rear end of the die fisiadapted to receive iapproximately one-half'of'the bar of half round;- stock S from which'the tong element isa to; be formed. Toward the forwardllend 5 of 'die: Athis channel merges: into a half- I i ound depression 2 disposed atrightangles.

. tothechanneld andiextendingto the-for- Y wardeiid 3 of the die. "Theother die is pro-' vided'with a similar quarter-round channel 41 withits flat surface 4: uppermost adapted toreceive the other'half of; thatpart of the stock'received in channel 1 of die A; this channel4,.however, is not 'continnedto the i.

'front end 5 of the diebut termina'tes substantially opposite thejunction or the chan: nels 1 and'2 ,in. die A, inja beVL-e'l'ed surface.T

6 running from the bottom of thechannel to r the face of die ,B.Consequently when the 1 "two" diesare arranged in operative jllXtflr'posed position as shown in Fig.1 the Chan nels l and tarje adapted tocontain, when the diesjare, forcedtogether, that portion of the stockwhich constitutes the handle of the tong element and which is thereforenot to'besha 'aedTp th di Referringnow to the second set of dies shownin Figs; 2,2? and 29,;Figr-2isa front .end View of thetwo dies G and Dseparated to permit the introduction of thefworklpiece previously shapedfrom :the stock'by the first diev operation, While FigL-"2 is a face I{View of'die Dtand Fig; 2? aface view'of die 0. 1 The die Chas ahalf-round channel lfformedcinnits face. whichf ex'tends clear totherearend ofthe die and .is adapted to receive that m of the workpiecewhich 'is'not to be shaped similarly to the: channels .1 and t in dies'A'xandB; this' channeI /Y is continued toward the' -front end 8 ofkthedie in a quarter-round channel 9, an inclined por' beveledfsurfa'cell0iconnectingithe' flat," horizontally disposed .face orfsurfacefi ofthe channel .9, with thehalf-round ch'annel I 7.; The'quarte'r-roundchannel 9 terminates f short of the front endv 8 of the-die and be- 7tween and said end the die is provided;

witha semi-cylindricaldepression llcor-" responding to a similardepression 12's tending'inwardly from the front end :13 of" thecomplementary die D. The diameter of member is to be formedand whichOflCOllI'SB approximates I the maximum IWidth of the channel .-The dieDis also provided with a quarter-round channel 1& extendingiroin thebottomof'th'e' 'depressionfl2 and ter-f minating inan j inclinedtransversely eXj-' tending surface 15} arranged substantially; ,intransverse alignment with .the jun'ctnref or the channels. 7 and 9 in"die C1 The; cy-

, lindrical' cavity formed by the id'epressions the cylindrical cavityformed-"by the depre's-' r sions 11 and 12 when. the jt'wolidies' arebrought together is. preferably considerably 3 'greaterthan the Widthofthe flat face F of 1 the half-round stockfrom. which-the tong.

11 andrl2 when the dies {are closed'is adapted toreceivefthelheading.tool {shown in Fig. '7; this tool is externally cylindricah of adiameter: to fit snugly in the cavity-andhas f flat front endll adapftedto bottc'imv on {the f inner end of"the" cayityiwhenthe heading 7 toolisfforced longitudinally*thereinto. The

tool is provided" \zvith zin' axial hollow semi-{ 3 ellipsoids-1eazyity" is extending inwardly fiofii it end 17 adapted to impart toTiger fl rted thereifito -zt substantially semi- The dieshaving beencons'tihietec i" sntstanfor ing machine, the} operations ineideet I tothe formation of the 'fiOii'g Lfii flfi -S may 110% he deserihedgend, asthe 'tfwo tong mem bers are similar with'rspeet tether-handle portions Hbut slightly differentwith respect to their jaws designated "generally Apiece of, half-round stoekief snfiicient length and proper size to fo-rmthe member is first selected and raised to a" snitzt'ble temperature atthe end onwhiehthe jaw is to be formed. -The:heeted ent1 of the stock vp H p V on the extremity of thetyawv; the heading tool shown in Fig. 7is force'dtlongitudinavfly into the fcylindri'cal' cavity formed by theI qdep re'ssionsll, and 12-111 the dies siibstanti is then placedbetween the dies A end-B which are sufficiently sepztrate'dafor"thi'sjpiirose s shownin Fig, 3' with the face of the stock uppermostaligned with the flat facesiofthe ehennel "1 v 91nd 4:;"theeX' tremit ofthe teel: b ing disposed substantie-11y flush with the forwai-c1;e1ids3' and 5 of thedi'es (Fig. 3 desirably the forging machineisprovidec'lwi i'th a stop-or' gm'ge (not shown) to insure the. properpositi'om 'ing of -th'estofc1 emlwise in the' dies as tvill be readilyunderstood" lih'rough suitable operation of the forging maehihe thediesv A and B are then (ilosed together so astiO ment withleach other.During this =operittion' the channels 1 ah'd' 4% receive and enclosethat portion ofthew'vo'rk piece which is to form theimndle H of the tongin'e'In her and which is therefoi e "not "to a'cte'd j 1 shown in Fig'sxi a nd' 5 hut with its" Center line X-'iY-offs'et helowwtui'd thus outof'oo} incidence with said" face *when' .viewed in Fig.4. i

i The vWork stantiallyes shownimI-Figs; iz-and 5 end, a primary purpose(of the-"second operation now to be described ,isrztd bring the centeriinfeiX;Y of the'npsetpontionU i i-to subs stantiztl coincidence"withthe flat--7fztce; of

the. s'toek; c To effect this" uresiflt g the wo'rk 7 piece therefore itthe comp le tion of the first dieoperatioif appears fstrb defied he "of"the"hend1e1-pottion et the I week pieeeyd irected towetd the channel 7piece Willi he forced hack relatively'to' the up'set portion Uhinto thechanne1's '7 and 9' with" the result thatthe" center" lines of thedenee' andthe'npset portion-thus caused to assume aposition.'symmetrieali with respect -to thehandl'e' 'portion' butWith'its fiztt fae disposed at rightengles to the correspondi-ngfae'eofthelatteix ally as the hitter are being brolight together or:immediately thereafter; with the *r'esuit that. that-portion of theupset: portion U- whichextendsinto said cavity is brought to ,thedesired shape. ."Ihus after thetool is -withd-rawn and the dies opened,a complete, finished jawsubstantial'ly of theiform'rshown in FigslS;9';and 10'has been formed 'onthe extremityiof the work piece and thetong :member isareedy, Without any furtherv opera- 7 ti'ons; forassembly with theother eo'mplementary inember toform the tongs save for;the drilling of the necessary ho'fe for the reeeption. :ofthe piyotstud" :Whi'Ch the members are-unitedatogether.

's-The operationof oi'm'in g the auxiliary jaw J on the other member issu'bstantizilly similar to'the'opemti'on offormingthe-main 1 jawheretofore described except-whet prior 'to-the 'Ifirst die operationthe. stock is cnot inserted-win. the die is fir was in the case of 'the'main zjraw but only. arlenohg'h;-.as ini'di'cztted' by. line a-6 in"Fi-"gs, 3 and I 5,. so that when it is ihserted:between'diesiG and;

D in the. sec ondfop'erati orn it's extremitywill lie substantiallyfliish With-"theihottom e1? '7 the cylindrical cavity for'med 'by'the-dei pre'ssioris Hand 12; O f coni'se since no head 1'. ,is to be'formed" onithe ztiiiz iliziry j'mw, j-the heading: tooiuis not used htall. duringgits f I formation; vif d'BSfidjf la""'p1ai1a bylil'ldriilplug may 3 he; fordedi; imothe oylindricttl i m a'irijltw so as toprevent eny of the metal of' 'the upset Tpoition' being; extruded the'ieatity through the presslflre of the 'diesl and heading toolli'ssforced: thereiiito diiringf'the s operations -in'cid"ent to'" theformation; of the piece isgitnrned through an m le ddfe ab out' its axisand ztheri introduced b'etfieen tomyinventiorn ,to insurethefpropershape and ffinishto the endof the auxiliary aw, but underordinary .='co'nditions the] useofsuch a plug is not requiredfif the endof thestock is: initially square;

. yTh'et main andaukiliaryjaws having thus 7 been formed on" therespective members of the tongs, the handle portions may be drilledtransversely at the proper points forthe reception.- of a pivot stud J?by, means of which'they' are pivotally secured together in thewellknownajmanner' so as to completedtong's as shown in Fig. 13.

For convenience of {manufacture the, two

sets of dies are ordinarily disposed one above theotherin the die holderof the forging v'machine so that as soon as theldies Aland 7 Bareseparated after the first dieoperation is completed the work pieceearn-be withdrawn 'from between them a and then preparatoryfto'thesecond operation conveniently inserted betweenthe dies C and D, after jhaving been 'turned'j as heretofore; explained through an angleoflQO",without the 'neces sity." of reheating. v

It will 1 thus be apparent that in accordance withmy novel 'method: ofimanufacture 'Whilejforjconvenience ofh diescription I" V Moreover whilewith:considerable"particularity a preferred i wmann'erfo fpractising'inyinventionand'have illustrated dies of the form which I prefer V j to:Iuomot tt'hereby desire or iinten d i to; restrict myselfsolely theretoas changes rand; modifications maybemadein the operait is" possibleto'form both the Y main and 4 auxiliary jawsidirectly upongfandflintegralso d -both .of the jaws are formedfbyithe dies uni formly,;.with" asuitable: finish and l iof the necessary degree of accuracy, the Jc0mple mentaryztong members may be assembled immediately to form the;tongs without the e necessityofany further operations or removal of finsor other bodies'of excess metal. In consequence, in accordance with. myinnwith-the handles of the tongs and thata's proved methodYI am ableto'produc e tongs ofthe character to? which it relates much, morerapidly and 'cheaply than has hitherto been possible while the' :to'n'gsso produced. are as :fullysatisfactory underpracticalcoin ditions f ofuseias :the tongs heretofore produced by any; of "the methods knownprior have herein employed. certain'terms such as '-horizontaland thelike as denoting position, it is to :be understood- I have. utilized thel same inla relativesense only and withrre'fer I -e'nce to theVariOusEfignres-as they appear in the drawings and not in any way in 'a"rev .stricting'orllimiting'sense.

" V have;herein described .tions and; sequence' gthereof incident tofthe,

. v ipractice'gof m invention and dies of" shapes 7 different from;those {which IghaVe illus- 'itr'ated' anddescribed" my be employed iform the.

gether to form theltongs. r V V n K 12. The method of manuiact-uringpipe tongs adapted" forpassage through a draw 7 ing' belljwhichcomprises the steps of formj :ple'ted tongs.

upon by the tongs.

forms other than those to whichl have referredfwithout departingv fromthe spirit and scope of the invention as defined in ithe j i appendedclaims. v

gHaving thus describedl my inventiomfI desiredito produce tongs hayingjaws'of claim" and desire; to protect; by Letters Pan ent of the UnitedSt-ates .2 v

'LxThet method of; -manufacturingi pipe tongs adapted for passagethrougha drawing bell which comprises the steps of form? ing as anintegral unit thejaw and handle of each of the pair of members formingthe tongsby-upsettingthe' end'of a piece of halfi round stock bysuccessive action of a ,plurality of dies socas to'ultimatelyfo'rmthereon a aw of a, shape suitable-for cooperation I with thecorresponding jaw of 7 the other member and then pivoting said-membersto ing, as an integral unitthe jaw an'd'handle ofjeach member cofa' pairof complementary members'by subjectingftheend of'aclength of half-roundstock'to the-successiveactioni v ofdiflerent setsof' diesto'therebyultimately- I form a jawluponithe endlof the stock adapt ed"for cooperation with a similarlyfformed j awon lZhQOllllF-HIBIIIbGIEandthen. pivoting said members together to form j, the com- 3. The"method of manufacturing 7 pipe tongs which comprisesthesteps of forming.L :a" finished headed jaw at one .end of-"a, work f piece consisting ofa-length of half-round stock by 'subjectingtthe end of the'piece to.

thelsuccessive action of 'aipluralityofdies, forming upon the end ofasecond work piece comprising a length of half round 'stock a" finishedunheaded Y adapted; for cooperaits tion v with theyother jaw bysubjecting the p 'endof the second workpiece to th'e'succes V sive'action ofa plurality of dies, and then 1 [pivoting the two "work piecestogether to] -form 'theconiplete'd tongs 'Withithe portions of the .twopieces'which have not heen 'acted dies forming the handles ofthe V 14;.The method; of manufacturing pipe tongs which consists of thestepsofforming c. by successive action of aseries offdies a finishedheaded jawcomprising a flaflfa ce on'one end of'a workpiece co'nsistin'gfof 7 length of half-roundstock,similarly form-J- ing on theendof an'dther workpiece 'con-Y 7 sisting of a Vlengthoflhalferound stock a"finished unheaded jawfalsorcomprising a Hat 7 f face and adapted tocooperate withthej aw d on the first piece; and then pivoting'the twofpieces together with their-flat -faces infjuXtafplosed relation to formthe eompleted' tongs 2 a method of forming asan integrall 'unit thejawandhandle ofoneinember of a pair of tongs, the steps of firstupsetting in a die the end of a piece of half-round stock of suflicientlength to form the jaw and handle to thereby produce on" the stock anupset portion of relatively short length of substantially half-roundcross section having its fiat face disposed at right angles to the flatface of the stock but with its center line out of coincidence with the"plane of 10 said. face and then bringing said upset portion by means ofa second die to a position with relation to the stock such that thecenter line of the fiat face of the upset portion is substantiallycoincident. with the plane of the fiat face'of the stock. I

6.'In a method forming thevjaw and handle of one member of a pair oftongs as an integral unit, the steps of first upsetting by 7 means of aset of dies one'end of a length of half-round stock so as to formthereon a half-round portion havingits flat'face disposed substantiallyat right angles to the corresponding face of the stock but "with one Iof its longitudinal edges more closely ad jacent theplane of the fiatface of the stock than its other edge, and then by means of anotherset-ofdies effecting relativemovement of the upset portion with respectto the stock until the longitudinal edges of the flat face of the upsetportion are disposed substantially equidistant from and parallel to theflat face of the stock.

7. In a method of forming the jaw and handle of one member of a pair oftongsas as an integral unit, the steps of 'firstupsetting one end of alength of half-round stock so as to form thereon a" half-round portionhaving its flat face disposed substantially at right angles to thecorresponding face of 40 the-stock but with one ofits longitudinal edgesmore closely adjacent the flat face of' the stock than its other edge,then eifecting relative movement of the upset portion with respect tothe stock until the longitudinal edges of the'flat face of the upsetportion are disposed substantially equidistant from and parallel to theflat face of the stock and substantially simultaneously with saidmovement forming the extremity'of the upset portion into a solid headofsubstantially cylindrical cross section.

In witness whereof I have hereunto set my hand, this 29 day of May,1928. r ENOCH B. KIBBY.

